var bandList = []  // global list of favorite bands

function addToList() {
    var input = document.getElementById("band");
    bandList.push(input.value);
    input.value = ""; // clear the text box
    updateList();
}

function clearList() {
    bandList = [];
    updateList();
}
function reverseList() {
    bandList.reverse();
    updateList();
}
function updateList() {
    var output = document.getElementById("list");
    output.innerHTML = "[" + bandList.join(",") + "]";
}